Question

Find the perimeter of the following shape:
A. 10.8
B. 11
C. 11.4
D. 11.6

Answer 1

A: 10.8

Explanation:

AD = BC

AB = DC

2AD + 2AB

AD = ±
`√(3^2+1^2)` ≈ ±3.1622

AD ≈ 3.1622

AB = ±
`√(2^2+1^2)` ≈ ±2.236

AB ≈ 2.236

2AD + 2AB = 2*3.1622 + 2*2.236 ≈ 10.79 ≈ 10.8